CNN has said they expect fewer viewers in Tuesday night’s debate, in part because of the absence of Trump, whose reputation for speaking his mind helped shatter rating records in the first two Republican debates. His polarizing views – and dominance in the Republican primary polls – ensures him a place in the conversation around the first Democratic debate Tuesday night, which will feature Hillary Clinton, Bernie Sanders, Martin O’Malley, Lincoln Chafee and Jim Webb.

Trump is far from the first candidate to take to Twitter during a debate. Sanders livetweeted the marathon September Republican debate, slamming the GOP candidates for not touching on issues like poverty or race.

Trump. What a pleasant and humble person. Can’t stop saying kind and generous things about his fellow Republicans. #DebateWithBernie